English, asked by priyankamarick2013, 11 months ago

what is obsidian
please say me fast​

Answers

Answered by Anonymous
21

Answer:

when lava is cooled down, you get a strange alkali material called obsidian.

Answered by PeepingMoon
2

Answer:

Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. Obsidian is produced when felsic lava extruded from a volcano cools rapidly with minimal crystal growth.

Category: Volcanic glass

Other characteristics: Texture: Smooth; glassy

Fracture: Conchoidal

Specific gravity: c. 2.4

Explanation:

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